Conduit fitting



April 23, 1929- G. R. METCALF, JR 1,710,060

CONDUIT FI'TTING Filed Sept. 8, 1927 W ZZi X A TTORNEYS. I

, m n; a :23; li an- A ES PATENT OFFICE;

Application filed Eleptember neck-out boxe -c are nrovided with comitively thin walls and are usually 'lorined such a erred enilnidinieni oi the invention d in the accompanying drawings means.

i 3 a side elevation oi? the san'ie,

1. rear elevation ct an inside sleeve. o a. side elevation of the same.

niarl-fs the wall ot a lznoeleout box, or litling. 2 :i conduit opening therein, and 3 a conduit :1 'anged in the Optdilllg.

Pi. securing sleeve -91; surrounds the conduit at the outer l'ace oi? the wall... This has a cylindrical portion 5 which coi'iiacts the con- (luit and a ilaring portion 6 which engages the wall. The sleeve is severed at 8 and cars l) are arranged in the cylindrical portion 5 for clamping this portion to the conduit and ears i) are arranged on the flaring portion (3. The flaring portion also has a slot 7 epposite the slot 8 which extends through the flaring portion only. Ears are provided at each side of the slot 7 and a screw 7* extends through these cars. A screw extends through one oil? the ears 9 and screws into the opposing car. A screw 10 operates similarly in the ears 9.

An inner sleeve ll has a tlange 12 which (nigages the inner lace ot the wall of the lit ting. 'lhis sleeve is severed at l3 and has ears lit at the edges o t the slit. A screw 15 extends throu o the car at one edge and through a se 'mv-tlnfeaded perforation in the opposite ear. Thus the inner sleeve may be contracted into engagement with the conduit with the flange .in engagement with the wall.

in placing the fitting the inner sleeve is clamped in engagen'ient with the inner face of the wall. The outer sleeve is pushed up against the wall and the eyliiulrical portion FITTING.

s, 1927. Serial No. 218,325.

clamped to the conduit through the action of the screw 10. Atter this clamping is a'll'ected the screws 10 and 7" are tightened. The ef-' feet of this is to bring the flared portion of the sleeve 4; inwardly and this crowds the inner edge oi this flared portion with a clamp ing action against the face of the box, thus forming arigid connection between the condull. and the box.

What I claim as new is e 1. In a conduit fitting, the combination of a box wall having a conduitopening there in; a conduit in the opening; means for locking the conduit against endwise Withdrawal movement relatively to the innersurface of the wall; a sleeve engaging the conduit having a flaring portion engaging the outer wall of the box; and means for successively con tracting the sleeve into engagement with the conduit and then springing the flaring portion into engagement with the wall of the box.

2. In a conduit fitting, the combination of a box wall having a conduit opening therein; a conduit in the opening; an inner sleeve engaging the conduitwithin the wall and engaging the inner surface of the wall; an outer sleeve engaging the conduit having a flaring portion engaging the outer wall of the box; andmeans for successively contracting the sleeve into engagement with the conduit and then springing the flaring portion into engagement with the Wall of the box.

3. In a. conduit fitting, the combination of a box wall having a conduit opening therein; a conduit in the opening; means forming a shoulder on the conduit engaging the inner surface of the Wall; a sleeve on the conduit Without the wall, said sleeve having a cylindrical portion and a flaring portion, said sleeve being longitudinally slitted and having ears on the cylindrical portion and ears on the flaring portion adjacent to the slit and screws exteiuling through said ears.

l. In a conduit fitting, the combination of a box wall having a conduit opening therein; a conduit in the opening; a flanged sleeve within the conduit; means for clamping the sleeve on the conduit with the flange in engagement with the inner surface of the wall; a sleeve on the conduit without the wall, said sleeve having a cylindrical portion adapted to engage the conduit and a flaring portion "a sleeve onthe conduitv to engage the conduit and a flaring portion adapted to engage the saline oi the hon, said sleeve being longitudinally slitted with ears adjacent to the slit in the cylindrical p01 tion and the flaring portion, said ere having an auxiliary longitudinal slit extending through the flaringiportien and opposite said first slot with. ears adjacent to the slit; and screws insaid ears adapted to contract the sleeve.

6. Al conduit fitting comprising i a split sleeve, said sleeve having a cylimlrical portionuand aflaring portionwith ears on the cylindrical portion and ears'on the flaring said-- earsysaid sleeve also having an auxiliary slit extending through the flaring portion only; ears adjacent to the auxiliary slit; and a screw through said last-n1entioned ears.

8. In a conduit fitting, the combination of a box all having a conduit opening therein; a conduit in the opening; means locking the conduit against endwise movement in one direction relatively to one surface of the wall; a sleeve engaging. the conduit and having a flaring )ortion engaging the other surface o E? the Wall; and means for successii-ely contractingthe sleeve into engagement with the conduit and then springing the flaring portion into engagement with the wall of the box.

In testimony whereof I have hereunto set my hand.

ononen RJMETCALF, JR. 

